Home / 81,089.40-111,901.56-45,282.78

Finding the Fourth Proportional to 81,089.40, 111,901.56 and 45,282.78

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Solution

The fourth proportional to 81,089.40, 111,901.56 and 45,282.78 is: 62,489.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,089.40 : 111,901.56 = 45,282.78 : x
  2. Step 2: Convert to fraction form
    81,089.40/111,901.56 = 45,282.78/x
  3. Step 3: Cross multiply
    81,089.40x = 111,901.56 × 45,282.78
  4. Step 4: Simplify right side
    81,089.40x = 5,067,213,723.14
  5. Step 5: Solve for x
    x = 5,067,213,723.14/81,089.40
  6. Step 6: Final answer
    x = 62,489.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.